143 lines
2.7 KiB
Ruby
143 lines
2.7 KiB
Ruby
require File.expand_path(File.dirname(__FILE__) + '/neo')
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class AboutControlStatements < Neo::Koan
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def test_if_then_else_statements
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if true
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result = :true_value
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else
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result = :false_value
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end
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assert_equal __, result
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end
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def test_if_then_statements
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result = :default_value
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if true
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result = :true_value
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end
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assert_equal __, result
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end
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def test_if_statements_return_values
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value = if true
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:true_value
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else
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:false_value
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end
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assert_equal __, value
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value = if false
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:true_value
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else
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:false_value
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end
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assert_equal __, value
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# NOTE: Actually, EVERY statement in Ruby will return a value, not
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# just if statements.
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end
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def test_if_statements_with_no_else_with_false_condition_return_value
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value = if false
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:true_value
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end
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assert_equal __, value
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end
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def test_condition_operators
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assert_equal __, (true ? :true_value : :false_value)
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assert_equal __, (false ? :true_value : :false_value)
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end
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def test_if_statement_modifiers
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result = :default_value
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result = :true_value if true
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assert_equal __, result
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end
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def test_unless_statement
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result = :default_value
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unless false # same as saying 'if !false', which evaluates as 'if true'
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result = :false_value
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end
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assert_equal __, result
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end
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def test_unless_statement_evaluate_true
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result = :default_value
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unless true # same as saying 'if !true', which evaluates as 'if false'
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result = :true_value
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end
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assert_equal __, result
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end
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def test_unless_statement_modifier
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result = :default_value
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result = :false_value unless false
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assert_equal __, result
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end
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def test_while_statement
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i = 1
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result = 1
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while i <= 10
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result = result * i
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i += 1
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end
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assert_equal __, result
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end
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def test_break_statement
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i = 1
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result = 1
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while true
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break unless i <= 10
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result = result * i
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i += 1
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end
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assert_equal __, result
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end
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def test_break_statement_returns_values
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i = 1
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result = while i <= 10
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break i if i % 2 == 0
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i += 1
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end
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assert_equal __, result
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end
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def test_next_statement
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i = 0
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result = []
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while i < 10
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i += 1
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next if (i % 2) == 0
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result << i
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end
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assert_equal __, result
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end
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def test_for_statement
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array = ["fish", "and", "chips"]
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result = []
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for item in array
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result << item.upcase
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end
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assert_equal [__, __, __], result
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end
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def test_times_statement
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sum = 0
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10.times do
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sum += 1
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end
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assert_equal __, sum
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end
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end
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